<a href="http://www.invisibleworks.org/" target="_blank">Invisible Works</a> has unveiled plans to fill one of London's city parks with a series of fantastical treehouse-like <a href="http://inhabitat.com/semi-permanent-wrap-up/semipermanent-wrapup/" target="_blank">semi-permanent structures</a>. The designers hope that the installations will inspire people to spend more time outdoors. Invisible Works intends for the temporary structures to remain in one of London's parks for 10 years, during which time the spaces can be used as a venue for concerts, movie screenings and other public events.

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London Treehouses Invisible Works

The Invisible Works team hopes to introduce a whole new set of structures that would help transform the way city inhabitants interact with their natural environment.

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London Treehouses Invisible Works

Privately financed installations would populate the parks and draw people away from overcrowded city streets and enable them to use parks more frequently.

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London Treehouses Invisible Works

The biophilic treehouse structures of the Invisible Cities will blend into the natural environment using a unique combination of sustainably sourced timber ribs and “eco” skin.

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London Treehouses Invisible Works

“A lot of people who look at parks think they should be untouched, unspoiled places,” said Ed Shuster, the project’s director.

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London Treehouses Invisible Works

Parks are usually experienced as patches of urban greenery that act as oases detached from the city.

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London Treehouses Invisible Works

Invisible Works hope to be able to use one of London’s parks over the next 10 years and expand their program throughout the city.

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London Treehouses Invisible Works

Invisible Works has unveiled plans to fill one of London's city parks with a series of fantastical treehouse-like semi-permanent structures. The designers hope that the installations will inspire people to spend more time outdoors. Invisible Works intends for the temporary structures to remain in one of London's parks for 10 years, during which time the spaces can be used as a venue for concerts, movie screenings and other public events.